iScience (Jun 2023)

Mechanism underlying follicular hyperproliferation and oncogenesis in hidradenitis suppurativa

  • Lin Jin,
  • Mahendra P. Kashyap,
  • Yunjia Chen,
  • Jasim Khan,
  • Yuanyuan Guo,
  • Jari Q. Chen,
  • Madison B. Lee,
  • Zhiping Weng,
  • Allen Oak,
  • Prasanth Patcha,
  • Tiffany Mayo,
  • Rajesh Sinha,
  • Venkatram Atigadda,
  • Shahid M. Mukhtar,
  • Jessy S. Deshane,
  • Chander Raman,
  • Carly Elston,
  • Boni E. Elewski,
  • Craig A. Elmets,
  • Mohammad Athar

Journal volume & issue
Vol. 26, no. 6
p. 106896

Abstract

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Summary: Hidradenitis suppurativa (HS) is a skin disorder that causes chronic painful inflammation and hyperproliferation, often with the comorbidity of invasive keratoacanthoma (KA). Our research, employing high-resolution immunofluorescence and data science approaches together with confirmatory molecular analysis, has identified that the 5′-cap-dependent protein translation regulatory complex eIF4F is a key factor in the development of HS and is responsible for regulating follicular hyperproliferation. Specifically, eIF4F translational targets, Cyclin D1 and c-MYC, orchestrate the development of HS-associated KA. Although eIF4F and p-eIF4E are contiguous throughout HS lesions, Cyclin D1 and c-MYC have unique spatial localization and functions. The keratin-filled crater of KA is formed by nuclear c-MYC-induced differentiation of epithelial cells, whereas the co-localization of c-MYC and Cyclin D1 provides oncogenic transformation by activating RAS, PI3K, and ERK pathways. In sum, we have revealed a novel mechanism underlying HS pathogenesis of follicular hyperproliferation and the development of HS-associated invasive KA.

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